Results 41 to 50 of about 6,178,117 (397)
Signatures of the core-powered mass-loss mechanism in the exoplanet population: dependence on stellar properties and observational predictions [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Recent studies have shown that atmospheric mass-loss powered by the cooling luminosity of a planet’s core can explain the observed radius valley separating super-Earths and sub-Neptunes, even without photoevaporation.
Akash Gupta, H. Schlichting
semanticscholar +1 more source
About time of hydrogen burning in stellar entrails. New formulas for approximation
Вісник Астрономічної школи, 2017 The relationship between the duration of nuclear reactions and initial mass of the star is an important component a wide variety of astrophysical problems.
V. A. Zakhozhay, S. I. Zabuga
doaj +1 more source
Comparison of stellar population model predictions using optical and infrared spectroscopy [PDF]
, 2017 We present Gemini/GNIRS cross-dispersed near-infrared spectra of 12 nearby early-type galaxies, with the aim of testing commonly used stellar population synthesis models.
C. Baldwin +5 more
semanticscholar +1 more source
Multiple Populations in Star Clusters
Universe, 2022 We review the multiple population (MP) phenomenon of globular clusters (GCs): i.e., the evidence that GCs typically host groups of stars with different elemental abundances and/or distinct sequences in photometric diagrams.
Antonino P. Milone, Anna F. Marino
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Stellar population analysis of two ellipticals [PDF]
, 2007 The spatial distributions of the mean luminosity-weighted stellar age, metallicity, and alpha/Fe ratio along both photometric axes of two nearby elliptical galaxies have been obtained using Lick index measurements on long slit spectra in order to ...
Milone, A. de C. +2 more
core +2 more sources
Streams on FIRE: Populations of Detectable Stellar Streams in the Milky Way and FIRE
The Astrophysical Journal, 2023 We present the first detailed comparison of populations of dwarf galaxy stellar streams in cosmological simulations and the Milky Way. In particular, we compare streams identified around 13 Milky Way analogs in the FIRE-2 simulations to streams observed ...
Nora Shipp +21 more
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Stellar populations in HII galaxies [PDF]
Proceedings of the International Astronomical Union, 2004 We analyse the stellar content of a large number of HII galaxies from the continua and absorption features of their spectra using population synthesis methods, in order to gain information about the star formation histories of these objects. We find that all galaxies of our sample contain an old stellar population (>= 1 Gyr) that dominates the ...
Eduardo Telles +3 more
openaire +6 more sources
MILES extended: Stellar population synthesis models from the optical to the infrared [PDF]
, 2016 We present the first single-burst stellar population models, which covers the optical and the infrared wavelength range between 3500 and 50 000 angstrom and which are exclusively based on empirical stellar spectra.
B. Röck +9 more
semanticscholar +1 more source
The Astrophysical Journal, 2008 The stellar content of M17 has been investigated by multicolor photometry and spectroscopy. Various independent estimates yield a distance of 2.1 ± 0.2 kpc. The ratio of total-to-selective extinction is R = 3.9. Within a projected area of 3.6 × 3.7 pc, there are several thousand stars.
R. Watermann +7 more
openaire +4 more sources
SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment [PDF]
, 2016 We study the internal radial gradients of stellar population properties within 1.5 Re and analyse the impact of galaxy environment. We use a representative sample of 721 galaxies with masses ranging between 109 M⊙ and 1011.5 M⊙ from the SDSS-IV survey ...
D. Goddard +25 more
semanticscholar +1 more source